Validation of sea ice concentration - American sector
Bulletin date: 2025-06-05
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-30:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9826 |
2684 |
64 |
120 |
8 |
6 |
0 |
0 |
| OW |
3 |
1283 |
135 |
320 |
79 |
7 |
1 |
0 |
| VODI |
1 |
394 |
168 |
791 |
470 |
60 |
13 |
0 |
| ODI |
0 |
23 |
24 |
281 |
781 |
251 |
57 |
0 |
| CDI |
0 |
2 |
1 |
222 |
1647 |
2939 |
1481 |
13 |
| VCDI |
0 |
0 |
0 |
232 |
690 |
6383 |
15728 |
14043 |
|
...date precedes bulletin
|
Date: 2025-06-01:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
10299 |
2352 |
97 |
49 |
4 |
5 |
0 |
0 |
| OW |
2 |
1489 |
135 |
350 |
80 |
9 |
2 |
0 |
| VODI |
0 |
479 |
168 |
701 |
426 |
117 |
15 |
0 |
| ODI |
0 |
48 |
30 |
344 |
691 |
350 |
41 |
3 |
| CDI |
0 |
1 |
6 |
332 |
1358 |
2997 |
3268 |
57 |
| VCDI |
0 |
0 |
0 |
16 |
796 |
4033 |
13512 |
16569 |
|
...date precedes bulletin
|
Date: 2025-06-03:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
10527 |
2844 |
92 |
77 |
7 |
12 |
0 |
0 |
| OW |
1 |
1390 |
216 |
463 |
54 |
18 |
0 |
0 |
| VODI |
0 |
152 |
100 |
989 |
406 |
58 |
0 |
0 |
| ODI |
0 |
4 |
8 |
440 |
1186 |
236 |
13 |
0 |
| CDI |
0 |
0 |
0 |
221 |
1489 |
3868 |
449 |
0 |
| VCDI |
0 |
0 |
0 |
17 |
651 |
5027 |
15324 |
14892 |
|
...date precedes bulletin
|
Date: 2025-06-05:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11213 |
2356 |
72 |
76 |
5 |
2 |
0 |
0 |
| OW |
198 |
1131 |
194 |
458 |
57 |
20 |
0 |
0 |
| VODI |
0 |
202 |
129 |
961 |
537 |
112 |
3 |
0 |
| ODI |
0 |
5 |
18 |
534 |
1054 |
305 |
26 |
0 |
| CDI |
0 |
3 |
2 |
227 |
1883 |
4291 |
1248 |
0 |
| VCDI |
0 |
1 |
0 |
26 |
469 |
3365 |
14082 |
15966 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11178 |
2381 |
69 |
81 |
4 |
1 |
0 |
0 |
| OW |
225 |
1080 |
190 |
401 |
54 |
27 |
0 |
0 |
| VODI |
8 |
227 |
138 |
1018 |
540 |
111 |
3 |
0 |
| ODI |
0 |
4 |
13 |
511 |
1007 |
312 |
25 |
0 |
| CDI |
0 |
5 |
5 |
235 |
1911 |
4092 |
1378 |
3 |
| VCDI |
0 |
1 |
0 |
36 |
489 |
3552 |
13953 |
15963 |
|
Date: 2025-06-07:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11048 |
2819 |
54 |
103 |
4 |
1 |
0 |
0 |
| OW |
32 |
1185 |
171 |
540 |
68 |
14 |
0 |
0 |
| VODI |
0 |
221 |
108 |
1077 |
505 |
113 |
1 |
0 |
| ODI |
0 |
11 |
26 |
619 |
893 |
432 |
36 |
0 |
| CDI |
0 |
9 |
7 |
199 |
1780 |
4109 |
2008 |
6 |
| VCDI |
0 |
5 |
0 |
38 |
117 |
2187 |
13287 |
17398 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11038 |
2772 |
42 |
118 |
3 |
0 |
0 |
0 |
| OW |
42 |
1224 |
169 |
461 |
57 |
22 |
0 |
0 |
| VODI |
0 |
219 |
131 |
1149 |
498 |
112 |
2 |
0 |
| ODI |
0 |
15 |
13 |
558 |
895 |
447 |
37 |
0 |
| CDI |
0 |
15 |
8 |
244 |
1777 |
3954 |
2036 |
3 |
| VCDI |
0 |
5 |
3 |
46 |
137 |
2321 |
13257 |
17401 |
|
Date: 2025-06-09:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12337 |
2197 |
95 |
55 |
9 |
0 |
0 |
0 |
| OW |
55 |
836 |
306 |
422 |
83 |
6 |
0 |
0 |
| VODI |
0 |
45 |
45 |
1798 |
627 |
50 |
0 |
0 |
| ODI |
0 |
3 |
2 |
313 |
2208 |
262 |
10 |
0 |
| CDI |
0 |
0 |
0 |
70 |
1307 |
4303 |
303 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
135 |
2290 |
16398 |
14661 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12132 |
1824 |
64 |
55 |
8 |
1 |
0 |
0 |
| OW |
258 |
961 |
232 |
535 |
128 |
11 |
0 |
0 |
| VODI |
2 |
257 |
117 |
1072 |
743 |
85 |
5 |
0 |
| ODI |
0 |
23 |
21 |
640 |
1054 |
328 |
46 |
0 |
| CDI |
0 |
16 |
14 |
331 |
2141 |
3886 |
1605 |
0 |
| VCDI |
0 |
0 |
0 |
25 |
295 |
2600 |
15055 |
14661 |
|
Date: 2025-06-11:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11440 |
3223 |
53 |
140 |
15 |
0 |
0 |
0 |
| OW |
0 |
1066 |
191 |
604 |
115 |
1 |
0 |
0 |
| VODI |
0 |
250 |
135 |
1561 |
695 |
44 |
3 |
0 |
| ODI |
0 |
21 |
4 |
445 |
1331 |
834 |
16 |
0 |
| CDI |
0 |
5 |
11 |
105 |
1094 |
4239 |
770 |
12 |
| VCDI |
0 |
0 |
0 |
0 |
358 |
4052 |
14485 |
13913 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11418 |
2692 |
45 |
153 |
13 |
0 |
0 |
0 |
| OW |
22 |
1252 |
165 |
671 |
156 |
5 |
0 |
0 |
| VODI |
0 |
459 |
100 |
949 |
638 |
147 |
9 |
0 |
| ODI |
0 |
117 |
56 |
678 |
676 |
482 |
55 |
0 |
| CDI |
0 |
45 |
28 |
356 |
1516 |
4515 |
1829 |
32 |
| VCDI |
0 |
0 |
0 |
48 |
609 |
4021 |
13381 |
13893 |
|
Date: 2025-06-13:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12632 |
2386 |
66 |
97 |
8 |
1 |
0 |
0 |
| OW |
102 |
1279 |
213 |
531 |
66 |
3 |
0 |
0 |
| VODI |
2 |
560 |
187 |
1334 |
611 |
73 |
5 |
0 |
| ODI |
0 |
35 |
52 |
573 |
1185 |
437 |
40 |
0 |
| CDI |
0 |
28 |
13 |
175 |
1491 |
3870 |
914 |
9 |
| VCDI |
0 |
0 |
0 |
12 |
1125 |
8994 |
11617 |
10505 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12504 |
1981 |
62 |
185 |
14 |
1 |
0 |
0 |
| OW |
227 |
1235 |
191 |
666 |
78 |
13 |
0 |
0 |
| VODI |
5 |
720 |
103 |
775 |
531 |
85 |
6 |
0 |
| ODI |
0 |
247 |
119 |
539 |
697 |
325 |
46 |
0 |
| CDI |
0 |
58 |
41 |
474 |
1867 |
5056 |
1691 |
15 |
| VCDI |
0 |
47 |
15 |
83 |
1299 |
7898 |
10833 |
10499 |
|
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